| 岩溶水矿床开采的矿柱稳定性分析 |
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| 引用本文： | 付士根,许开立.岩溶水矿床开采的矿柱稳定性分析[J].华北科技学院学报,2014(2):48-52. |
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| 作者姓名： | 付士根 许开立 |
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| 作者单位： | [1]东北大学,辽宁沈阳110006 [2]中国安全生产科学研究院,北京100012 |
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| 摘 要： | 谷家台铁矿是岩溶水矿床,在使用矿体顶板帷幕注浆防水的情况下,矿山采用点柱上向水平分层充填采矿法开采。针对矿柱稳定性问题,通过FLAC3D有限差分数值模拟方法,定量地计算和分析矿体开采过程中采场充填后不同开采步骤下采场点柱和间柱的应力、位移和塑性区的分布状况,模拟出它们随每步开采应力和应变的动态变化过程。根据模拟显示的间柱对上部矿体的支撑作用明显好于点柱结果,建议矿山在综合评价经济效益的基础上,可考虑每个矿房之间保留间柱,实现矿山的安全高效开采。
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| 关 键 词： | 大水矿床 矿柱稳定性 数值分析 开采步骤 |
Stability Analysis on Pillar for Point -pillar Mining of Karst Water Mine |
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| FU Shi-gen,XU Kai-li.Stability Analysis on Pillar for Point -pillar Mining of Karst Water Mine[J].Journal of North China Institute of Science and Technology,2014(2):48-52. |
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| Authors: | FU Shi-gen XU Kai-li |
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| Institution: | 1. Northeastern University, Shenyang , 110006, China; 2. China Academy of Safety Science and Technology, Beifing , 100012, China) |
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| Abstract: | Gujiatai Iron Mine is karst water mine and upward horizontal slicing stoping filling method with points and pillar shall be used to mine when ore body roof curtain grouting is used for waterproof. Aiming at stability of pillar, stress, displacement and distribution of plastic zone between stope point pillar and barrier pillar shall be quantificationally calculated and analyzed with method of FLAC3D finite difference numerical simulation under different mining steps after stope filling during mining of ore body so as to simulate their dy- namic change process as mining stress and strain change on each step. The simulation shows that barrier pillar is obviously better than point pillar at supporting upper ore body so that it is suggested that barrier pillar shall be kept between each each chamber of the mine under consideration on the basis of comprehensive evaluation of economic benefit in order to fulfill safe and high - efficient mining of the mine. |
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| Keywords: | Karst water deposit stability of pillar numerical analysis mining steps |
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